Researchers found that the greater the height difference in a couple, the happier the wife was.

"Although it has been known that women prefer tall men in mating for evolutionary reasons, no study (before this one) has investigated whether a taller husband makes his wife happier," said researcher Kitae Sohn, from Konkuk University in Seoul, South Korea.

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RULES OF ATTRACTION: It has long been known women prefer taller men

"A greater height difference in a couple was positively related to the wife's happiness."

“A greater height difference in a couple was positively related to the wife's happiness”

Kitae Sohn, from Konkuk University in Seoul

But boffins also announced that the 'height hots' are only temporary.

Dr Sohn added that the relationship between height and happiness 'gradually weakened over time and entirely dissipated by 18 years of marital duration'.

The scientist went on to compare women's craving for tall men to our desire for sugary treats.

It said: "This is similar to people favouring fatty, salty, and sugary foods without knowing exactly why: such foods are essential to survival but were scarce as humans evolved - hence craving such foods increased reproductive fitness in the past.